grandbrat
grandbairn
grandkid
oe
grandbaby
grandbabe
grandyoungin
grandson
grandwean
great-grandson
nevvy
grandboy
great-grandkid
catworm
granddaughter
third cousin
stepbairn
skid
step
great-grandchild
stepkid
great-granddaughter
titiwi
bimboy
second cousin once removed
first cousin twice removed
great-great-grandson
trot
godson
bar mitzvah
paddle
grandboomer
great grandchild
first cousin thrice removed
grandsonship
peanut
grandgirl
poop factory
pooper
young'un
poop machine
nephewly
babe in arms
second cousin
poppet
laddie
parental unit
boy
uncle
little